Wire grid polarizer and manufacturing method of the same

Abstract

A wire grid polarizer has mainly a resin substrate (1) having grid-shaped convex portions (1a), a dielectric layer (2) provided to cover the grid-shaped convex portions (1a) of the resin substrate (1) and at least part of side faces (1b) of the portions, and metal wires (3) provided on the dielectric layer. The wire grid polarizer has a microstructural concavo-convex grid structure having grid-shaped convex portions, is not limited in structure, and has both the excellent degree of polarization and excellent transmittance over a wide range in the visible region.

Description

technical field [0001] The present invention relates to a wire grid polarizing plate, a method for manufacturing the same, and a liquid crystal display device using the same. Background technique [0002] Due to the development of photolithography in recent years, it has become possible to form a pattern of a fine structure having a pitch at the level of the wavelength of light. A member and a product having such a pattern with a very small pitch are widely used not only in the semiconductor field but also in the optical field, and are very useful. [0003] For example, a wire grid formed by arranging conductive wires made of metal or the like at a specific pitch, as long as the pitch is relatively small (for example, 1 / 2 or less) compared to incident light (for example, the wavelength of visible light is 400nm to 800nm) , then almost all the light of the electric field vector component vibrating parallel to the wire is reflected, and the light of the electric field vector ...

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Problems solved by technology

[0005] However, the above-mentioned wire grid polarizing element has the problem that resonance in the visible light spectrum must be taken into account when used as a diffraction grating, and a sufficient degree of polarization cannot be obtained in the low-wavelength region of visible light.

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